baywax said:
(is this off-shoot going to resolve in an understanding of randomness and free will?)
It might if we return to the metaphysical origin of the perceived conflict.
Ancient greeks dichotomised action into chance and necessity. What we today call the random and the determined. And these are indeed the two extreme possible states for simple systems.
The question for simple systems then is whether this means all such systems are either of one kind, or the other kind? So either completely deterministic (eg: GR) or completely probablistic (eg: QM).
Or instead, we could recognise that the dichotomy crisply defines two kinds of limits that can be approached (so all actual systems exist in the spectrum of possibility that lies in-between). So some systems are as random as possible (like a coin-tossing process), or as determined as possible (like a coin
placing process).
Then having got a good fix on simple systems, we can ask what is different about complex systems. Do the same dichotomies actually apply once reality has this further dimension?
If you are of the "more is different" camp, then yes, new dichotomies, new metaphysical-level distinctions, are required to capture this different dimension of truth.
But the ancient greeks did not really develop any. And modern science has not done too well at popularising any either.
There is the concept of autonomy to stand for what is special about a complex system's choice making abilities - creative action within bounding constraints. But what do we call the simple system's abilities in this context? What is the right word (non-autonomous not adding much to the discussion)?
One quite good dichotomy coined by Stewart and Cohen is complicity~simplexity.
This would be an example of modern metaphysics - attempting to create new unifying concepts that generalise from scientific understanding.